Roll feed for metal-heading machines



Feb. 5, 1929. Lf

` c. T. BRENNAN ROLL FEED FOR METAL HEADING MACHINES Filed Aug. 13, 1927 Mgg/M7 mf.

, ieee.

Patented Feb..

CHARLES TVBHENNAN, or wATEaBUar, CeNNEerreur,` AssIGNoH To' THE E; J. MAN- VILLH MACHINE COMPANY, or WTNHBUHY; CONNECTICUT, .AICORPCnATC'N or Y CONNECTICUT. v

ROLL FEED FOR METAL-HEADING- .MACHINE pplication ledAugust 13, 1927. Serial No. 212,626.

Stock in the form of a rod or a coil of wire Iis commonly fed into machines in which 1t Vis cut and then swaged, headed or punched, by rolls that grip the stock and are intermittently rotated to advance the end of the stock to the operating tools. v

In these machines to ensure an accurate advance of the stockl the feed rolls must grip n the stock with a strong' bite, and to provide the necessary grip7 and permit the use of stoel; of different diameters, and enable the rolls to be separated for the removal of the feed the bearings ofthe roll shafts,-especialf ly the bearings nearest the rolls, become severely worn in a short time and require frequent renewal. l

The present invention relates to the mounting of the feed rolls and their shafts and the bearings therefor.

The object of the invention is to provide a construction for these parts whereby the bearings which are subjected to severe wear may be readily removed and new bearings substituted without dismantling all of the elements of the entire feed mechanism.

' This object is attained by setting hardened and ground bearing bushings in the frame and box and setting on the shafts bearing sleeves that rotatably Vlit the bushings, and attaching vthe feed rolls to lthe shafts in such manner that they maybe easily taken offand leave the shafts with the sleeves free to be withdrawn from the yframe and box without removing the gears or the intermittently actuated driving elements from the shafts. 'Vhen the shafts are removed the bearing sleeves may, by suitable means, beforced off the shafts and new ones substituted, after f` which the shafts may be replaced. This are forced.

in the frame and box, as is customary at the present time in the machines in common use.

In theV accompanying drawings Figlf 1 Vshows a vertical section of a feed mechanism for a heading machine, 'said yn iechanism being constructed according to this invention. Fig. 2 shows the upper feed roll shaft with the feed roll and the parts which fasten to he shaft separated therefrom. Fig'is a 'similar view of the lower shaft and'feed roll. vFig. l shows a front view of one of the capsv rwhich are applied to the ends of the shafts and upon which the feed rolls are mounted.

Fig. 5 is a section of the cap.

The feed roll frame 1 is designed to be at?v y tached to the front end of a heading'mao'hine bedin the usual position, lthe machine itself,v

being old and well known, is not shown.V lIn suitable openings inthe vlower Section of this frame hardened'and ground steel bushings 2 On thelower shaft 'there are forced sleeves .4, preferably bronze, the exteriors of which are ground and fitted to turn in the bushings. The front orfroll end of the .shaft is turned down and milled toprovide a lug 5. Fitted upon this end offthe shaft is a cap 6 which has a slot 7 that fits the lug so that the cap will be turned positively with the shaft. On this cap is tted the lower feed roll 8, a key 9 being provided to ensure the rotation of the roll with the cap and shaft. VAfter the feed roll has been `placed upon the cap a holding plate l10 is secured in front of the roll by a screw 11 that is turned through the cap into the end of the shaft;

Keyed on the other end of the shaft is a driving gear 12, and thelclutch 13 which'is lactuated by the arm 14 to give'an intermit tent rotator'y movement to the driving gear in the manner well known to thistyp'e of feeds.

The upper shaft 15 has two sleeves 16 forced upon 1t. rlhese sleeves are desirably of bronze and are groundto fit the hardened i bushings 17 that are forced linto the bearing box 18. rlhis bearing box is pivotally mountled in the frame on the pin 19, and its front or roll end is forced down by the spring 20 which is compressed to give it the proper tension by the hand screw 21 that turns through an extension 22 of the box,'against a plate 23 seated on the upper end of the spring. The front end'of this upper shaft is milled off to provide a lug 24 and on this end of theV shaft is fitted the cap 25 with slot 26' which receives the lug. The upper feed roll 27 is fitted on this cap and is held in place by the plate 28 and screw 29 the same as is the lower feed roll. On tiie rear end of this'upper shaft is a gear 30 that meshes with the driving` rit is necessary` 'to' renew these bearings the plates at the front of the feed'rolls are removed. rlhis permits the feed rolls to be taken off. Any suitable screws may then be turned through the threaded perforations 3l `(Fig fl) in the caps against the ends of the shafts so as to force the caps off from the ends of the shafts. lllith these parts removed after the key (Fig. l) is lifted from the lower shaft into the space 33 m the brake mechanism 34, the lower shaft with the driving gear, clutch and operating mechanism attached may be pulled out, after which the upper shaft with its gear may be withdrawn. TWhen the shafts have been removed the bearing sleeves on the front end of the shafts, which are those that are subject to the severe wear, are forced off and other sleeves substitutedl Vhen the new sleevesare substituted the shafts gare simply returned to position, the caps applied, the rolls placed upon the caps and the plates fastened in front. This l arrangement provides a constructioniwhich is cheapv to manufacture and assemble and facilitates the renewal of the parts which wear-most quickly, when such is necessary. y

The invention claimed is: A l. A roll feed mechanism for a metal heading machine, comprising a pair ofv shafts, each of which at one end has a detachable feed roll and at the other end has a driving gear,'said shafts being supported so that the rolls may be opened from and closed toward each other, a spring tensioned to close said rolls together, the bearings for said shafts comprisingbushings forced into openings in the supports and sleeves forced upon the L shafts and adapted to rotatably fit in said Y bushings, and means detachably securing the feed rolls to the shafts, the forward ends of said shafts being smaller in diameter than the interior diameter of said bushings, whereby the feed rolls may be detached and the shafts and sleeves withdrawn from said bushings without removal of said gears from l the shafts.

2. A. roll feed mechanism for a metal heading machine, comprising a pair of shafts, one of which is supported in a fixed position and has a driving gear, While the other shaft is supported to oscillate and has a driving gear, the bearings for said shafts comprising bushings forced into openings in the shaft supports and sleeves forced upon the shafts andy adapted to rotatably fit in said bushings, feed rolls detachably secured to said shafts, and a spring pressing against ythe oscillatory support and adapted to force the roll it carries toward the roll carried by the fixed support, the forward ends of said shafts being smaller in diameter than the interior diameter of said bushings, whereby the feed rolls may be detachedand the shafts and sleeves withdrawn from said bushings without removal of said gears from the shafts.

3. `A roll feed mechanism for a metal heading machine, comprising a pair of shafts, one

of which is mounted in a fixed frame and has.

a driving gear and mechanism for imparting an intermittent rotation to said gear, while the other shaft is mounted in an oscillatory box and has a driving gear, the bearings for detached and the shafts and sleeves with-v drawn from said bushings without removal of said gears from the shafts.

errantes T. nnsiiniiii. 

